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Tint seal strip without nitrosamine release and preparation method thereof

A technology of nitrosamine and sealing strip is applied in the formulation of rubber, light-colored EPDM rubber sealing strip and its preparation field, which can solve problems such as harm to human health and environmental pollution, maintain reasonable cost and reduce environmental pollution. , the effect of good compression deformation

Inactive Publication Date: 2011-08-03
ZHEJIANG DALI AUTOMOBILE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product is vulcanized in a salt bath, and the waste water generated during the processing contains nitrite, causing environmental pollution and endangering human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, a kind of preparation method of the light-colored sealing strip that does not release nitrosamine, carries out following steps successively:

[0031] 1) Mix 100 parts of EPDM rubber, 30 parts of nano-kaolin, 30 parts of heavy calcium, 20 parts of fumed silica, 10 parts of titanium dioxide, 50 parts of paraffin oil, 6 parts of vaseline, 1 part of anti-aging agent MB and polymer Put 0.5 parts of ethylene glycol (PEG4000) into the internal mixer for mixing. The mixing is: the top bolt pressure on the internal mixer is 7±0.5MPa, the mixing time is 1min, and the debinding temperature is 150±5°C .

[0032] 2) Cool the product obtained in step 1) to room temperature (20~30°C), add 5 parts of dicumyl peroxide (DCP) and 10 parts of zinc acrylate, and mix in an open mixer. The temperature is 60±5℃, and the mixing time is 1min.

[0033] 3) The product obtained in step 2) is subjected to thin-pass treatment twice on the open mill, and each thin-pass treatment is as ...

Embodiment 2

[0043] Example 2, a preparation method of a light-colored sealing strip without nitrosamine release, whose components and weight ratio are changed to: 100 parts of EPDM rubber, 20 parts of nano-kaolin, 30 parts of heavy calcium, and fumed white 15 parts of carbon black, 30 parts of titanium dioxide, 40 parts of paraffin oil, 2 parts of Vaseline, 1 part of antioxidant MB, 4 parts of 1,4-bis-tert-butylperoxycumene, 8 parts of zinc acrylate, polypropylene glycol ( PPG600) 3 servings.

[0044] All the other processing steps are with embodiment 1.

[0045] After testing, the main technical indicators of the obtained sealing strip are as follows:

[0046] Nitrosamine content: not detected.

[0047] Tear strength (MPa): 11.0;

[0048] Elongation at break (%): 355;

[0049]Ozone aging resistance (stretch 20%, 40±2 ℃×72h, ozone concentration 2±0.2×10 -6 ): no cracks;

[0050] Pollution (50℃×24h+63℃×16h, 4.41N for load): no pollution;

[0051] Anti-yellowing property (ultraviolet...

Embodiment 3

[0053] Example 3, a preparation method of a light-colored sealing strip without nitrosamine release, whose components and weight ratio are changed to: 100 parts of EPDM rubber, 30 parts of nano-kaolin, 10 parts of heavy calcium, and fumed white 18 parts of carbon black, 20 parts of titanium dioxide, 30 parts of paraffin oil, 8 parts of Vaseline, 1 part of antioxidant MB, 5 parts of benzoyl peroxide, 6 parts of zinc acrylate, and 2 parts of polyethylene glycol (PEG8000).

[0054] All the other processing steps are with embodiment 1.

[0055] After testing, the main technical indicators of the obtained sealing strip are as follows:

[0056] Nitrosamine content: not detected.

[0057] Tear strength (MPa): 10.8;

[0058] Elongation at break (%): 360;

[0059] Ozone aging resistance (stretch 20%, 40±2 ℃×72h, ozone concentration 2±0.2×10 -6 ): no cracks;

[0060] Pollution (50℃×24h+63℃×16h, 4.41N for load): no pollution;

[0061] Anti-yellowing property (ultraviolet light irra...

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Abstract

The invention discloses a tint seal strip without nitrosamine release. The seal strip comprises the following components in parts by weight: 100 parts of ethylene-propylene-diene rubber serving as a basic formula, 10-30 parts of nano kaolin, 10-30 parts of ground calcium carbonate, 5-20 parts of white carbon black, 5-30 parts of titanium powder, 30-50 parts of paroline, 2-8 parts of Vaseline, 0.5-5 parts of antiager, 0.5-5 parts of peroxide vulcanization, 0.5-3 parts of dihydric alcohol and 5-10 parts of crylic acid. The invention also discloses a preparation method of the tint seal strip without nitrosamine release. The preparation method comprises the steps such as mixing, thin through treatment, microwave curing and the like. The tint seal strip can be used for eliminating the release of the nitrosamine, thus the tint seal strip has the characteristic of environmental friendliness.

Description

technical field [0001] The invention relates to a rubber formula, in particular to a light-colored EPDM rubber sealing strip and a preparation method thereof, belonging to the technical field of rubber preparation. Background technique [0002] Nitrosamines are a class of volatile N-nitrosoamines, which have strong carcinogenic effects. In traditional rubber production, many accelerators and sulfur donors are prepared from secondary amines. When vulcanized, the accelerators or sulfur donors will release part or all of the secondary amines. When there are nitrosating agents such as nitric oxide, In the presence of nitrogen dioxide, etc., these secondary amines will be converted into stable nitrosamines, causing harm to the environment and human life. Therefore, the elimination of nitrosamines produced from rubber compounds is an urgent problem to be solved in the rubber industry. [0003] As early as 1982, Germany promulgated regulations to control the content of nitrosamin...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K3/34C08K3/26C08K3/36C08K3/22C08K5/14C08K5/098B29C47/92B29C35/08B29C48/92
CPCB29C48/92B29C2948/92561B29C2948/92704B29C2948/92904B29C2948/92923
Inventor 陈文杰俞利芬
Owner ZHEJIANG DALI AUTOMOBILE PARTS
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